Stealth ability is not working

Hi, i'm using the trial version (last one, downloaded yesterday) of ZoneAlarm Pro and i'm surprised that it failed the port scan test. I have port 21, 25, 80 and 443 not stealthed. I know that ZA has options to close ports, but shouldn't it be automatic? This is strange, because i used ZA before, and i remember that it used to
pass the test! I've recently tested other firewalls and they passed the test. What can be the cause?

I have both Internet Zone and Trusted Zone Security in High
I'm using XP Professional SP2

Re: Stealth ability is not working

Re: Stealth ability is not working

Hi Bill,thanks for the reply. Although your thought is correct, i don't have a router, i'm only using a cable modem (Arris). I'm just a little confused because it used to work, some months ago i used ZA Pro with perfect scan port tests. And as i wrote in my first post, with other firewalls the ports are all stealthed.Thanks once again.
Best regards

Re: Stealth ability is not working

I don't know if your Arris modem does NAT but my guess is it does. Their website says, "Simple Home Networking via Bridged USB & Ethernet ports" suggesting it does indeed do NAT ( network address translation). The other possibility is that you might have granted 'server' rights in programs in your Zone Alarm Pro Program control which are opening ports?

Re: Stealth ability is not working

Hello Bill, once again thanks for your help.
I think that magic has been done! Yesterday i re-tested my firewall and, i don't know why, it passed the test perfectly !!
I did what you told me, i removed all server rights from all the programs which had them, and it did some diference, i had no more open ports, only some closed but not stealthed. Then i gave server rights to programs again (put it back the way it was), shut down computer and went to sleep.
Next day, VOILA !
Maybe a reboot was needed, i don't know...
Well, the fact is that my connection is now secured.